Joint for corrugated paper-board.



E. M. HAWKINS & P. G FEEL BY.

JOHIT FOR CORRUGATED PAPER. BOARD.

APPLICATION FILED DEC. 27, 1913.

Patented; June 30, 1914.

HUT/1158858 THE/R A TTOR/VEY UNITED STATES. serene {EQGAI}. M. HAWKINS,or

secession on NEW YORK.

' K ROCHESTER, NEW YO RK. AND FRANK (3-. FEELEY, ()It? 1' ILL IHQIS,.ASSIGNORS TO M. D.. K NOWLT0N COMPANY,

I Specification of Letters Patent. Application filed December 2?, W13.

OF ROCHESTER, It

JOINT Fort connoenrsn PAPEB-BGAED.

Patented, dear Serial 3%. 808,855.?

7 '0 all it mag [concern .Be it'known that we, EpoAu M. HAWKINS andFRANK G; KEELEY, citizens of the United States, and residents,respectively, of Rochester, in the county of Monroeand State of NewYork, and of Chicago, in the county of Cook and State of lllinois, haveinvented certain new and useful Improvements in Joints for CorrugatedPaper-Board, of which the following is a specification.

This invention relates to a joint for corrugated board, and especiallyto a joint for corrugated paperboard boxes, and the main objectof theinvention is to rovide as a substitute for the weak taped ointsheretofore used for joining section of corrugated board a new type ofjoint having a strength equal to or greater than that of the boarditself;

.It is well known that the taped joint now in general use for joiningthe ends of the board in a paperboard box is the weakest part of such abox. The joint of the present invention is intended to be formed eitherwholly or mainly from the material of the board itself. This would bedifiicult to do and obtain a strong joint with corrugated hoard asformed in the past, as it was the regular practice to use lining sheets,articularly on the inside of the board, of insuflicient strength forsuch a purpose. It is now intended, however, to make the corrugatedbourd with lining papers of much greater strengths than those heretoforeused, and these can be used to produce joints the strength of which willbe e1 ual to or greater than that of the board itself.

In carrying the invention into effect a corrugated board made fromlining sheets and a corrugated filler of the desired strength is reducedin cross section at an end to be joined in such a manner as to becapable of receiving a portion of the other end of the board, and thetwo sections to he joined when placed together are secured in positionby suiteblemeans, as by stitching, or by staples, or by an adhesive.In-the form of invention here shown, both of the ends to be joined areprovided with tongues at one side thereof formed by crushing down thefiller andthese tongues, each comprisin the two lining' sheets of theboard with t interposed crushed filler, are secured together :mbverlapping relation.

in the accompanying drawing 1 1s a perspective of a onepieo gnade fromcorrugated paperboard an ing a jo ntifornied in accordance presentiesgention. Fig. 2 is es cross-sectional detailof the joint.

Similar reference characters like parts in all the figures oi the cdesignate end sections of o board suita hie for the purpose of 5 a jointfrom the materials the be This means that the filler f is material andthat the inner and oi. sheets 2' and 0 have considerable s suiiicient toenable them to form, .V A eriy combined as hereinaier descrined, jointthat will be at least asstrongr as board itself. The end sections of corgated board so constructed me" then so ably treated to produce a su ii-e joint.

In the present case, the two end erections 2--2 of the board reduced "bycrushing; down one side of each board tociese cont with the oppositeside for the proper tance. The sum of the thickness of the resulting twotongues 3 3, is con erahiy less than the thickness of heard, andnecessitates the insertion of a filler the tongues. .Forthis purpose Wepi employ a fiber strip or solid hoard may be the usual fiber containeroroper thickness. When insert. between the two tongues the joint formedwill he secureiy stitches, rivets, staples or otherwise. 5, are shown inig. 2 for mes joint. The filler i may extend or i yond the lines of thecrushed portions, as desire It will be clear :i'roni the tors theutilization of the strong lining the board in the formation of the ointin the manner illustrated and descrihei'? will produce a joint of astrength eons; greater than that of the board its-sl What we claim is:-

.1. A joint for corrugated he prising a pair of overt-tipping he ochhaving at one sideythsrete wngue formed by the crushing o rugatedfiller, and means for seem tongues together.

2., A joint for corrugated prising a pair of overlapping i3 each havingat one side thereof a reduced tongue formed by the crushing of thecorrugated filler, a solid board for filling the space between saidtongues, and means for 5 securing Said tongues and solid board together.

3. A joint for corrugated board, comprising a pair of overlapping boardsections, ea h composed of two lining sheets with an 10 in erposedcorrugated filler and each having at one side thereof a reduced tonguecompm'sing the opposite lining sheets, and means forhseeuring saidtongues together.

4:. A joint for corrugated board com- 15 prising a pair of overlappingboard sections, each composed of two lining sheets with an interposedcorrugated filler and each having at one side thereof a reduced'tonguecomprising the opposite lining sheets, a board interposed betweensaidtongues, and means for securing said tongues and board together.

In witness whereof we have hereunto signed our names in the presence .oftwo subscribing witnesses.

EDGAR M. HAWKINS. FRANK e. FEELEY.

Witnesses as to Edgar M. Hawkins THOS. D. PATTON, HENRY A. W001).Witnesses as to Frank G. Feeley:

R. C. LEN, N. F. oRmssnY.

